After riding mine with a GX 10spd and an X.9 10spd derailier this summer and hating the chain slap I got the new Sram GX DH 7spd drivetrain and the bike is now basically silent.
Worthy upgrade and with the GX DH full drivetrain costing less than an X01 DH derailer alone its not too expensive.

Mint condition Pinarello Dogma Magnesium AK61. Bike has full Campagnolo Record 10 groupset. Campagnolo Shamal Ultra Wheelset. Bontrager full carbon XX bar, stem an saddle.
Not sure of the exact year as the bike was an inheritance and has seen no use for years.

Noro Aurum C7.3 Ex-Rentals for sale. I have 1 Small 2 Medium and 2 Large available.
These bikes were stripped and built up with our rental parts in the spring so the only things used are the frame, fork and stem. Everything else is brand new including shock.
Frames were covered in 3M tape while being rented to keep it as fresh as possible and any worn pivot/headset/bb bearings have all been swapped out pre sale.

Specialized Demo 8 1 Ex-Rentals for sale. I have 2 Mediums and 4 Larges available.
These bikes were stripped in spring and built up with rental parts so the only things used are frame, shock, fork, stem and rear hub which have new Sun Inferno 3 Rims built up. Everything else on the bike is brand new stock components.
Bikes were covered in 3M tape to keep it as fresh as possible.